I have a J7S pump and motor. I have taken it apart to replace the mid-casing and can't figure out how to remove the impeller from the motor shaft so that I can replace the cracked mid-casing. Is there a trick or retaining ring that I can not see?

Most pump motors have a circular plastic cap in the center of the motor. Removing this cap will give you access to the motor shaft. Some shafts have a slot for a screwdriver to hold the shaft while you unscrew the impeller or in some cases the impeller bolt. Some are reverse thread so try both directions if it won't loosen.Hope this helps.

follow this steps and fix it. God bless you

1. Turn off the pump motor and close the input and output valves.
2. Loosen the fasteners that secure the tube connecting the pump and motor.
3. Move the motor away from the pump housing.
4. Remove fasteners holding the diffuser to the backplate.
5. Inspect the diffuser and O-ring for wear, replacing as needed.
6. As needed, remove fasteners attaching the impeller to the shaft. Alternately, the impeller may be screwed on to the end of the shaft.
7. Remove the impeller and seal from the shaft.
8. Inspect and replace the impeller and seal.
9. Reassemble the pump.

Must disassemble the pump from the motor. The impeller has RH threads so hold motor armature (do not damage it) and turn impeller CCW to remove it from end of shaft. Hold armature in left hand and rotate impeller with right hand, turning hand on impeller back toward your body, or top of impeller toward you. Don't know how else to describe it. Once you have the impeller off everything should come apart pretty easily.
If impeller is really stuck, you will need to figure out how to hold it evenly all the way around without putting pressure on blades. Strap wrench, home made jig, something that can put more pressure on it than your hand.
You may want to remove the motor field so that you can grasp the armature while removing the impeller, do this by removing the long screws from the end of the motor.

Gently pry, tap, slide, however you can, get the bearings off the armature shaft without damaging any parts attached to it like fans, or starter centrifugal weights. Those things can be removed if needed.


Put new bearings on by sliding over shaft and seating in place by driving against the center race only. Do not drive bearing on by striking the outer race to move the inner race, this will damage the bearing.

From this question I assume you already have a motor. Anyway, most motors separate from the pumps by first taking apart the pump and removing the impeller. Some impellers have a screw in the middle that have left handed threads. Once this screw is removed the impeller can be unscrewed by holding the motor shaft with a wrench and turning the impeller counter clockwise. To gain access to the motor shaft to hold it there usually is a cover at the end of the motor that comes off. When the impeller is off there are usually bolts that hold the pump to the motor. When reassembling the motor it is important to replace the ceramic seal and gaskets. I hope this helps.

If the shaft seal has been leaking for some time the stem on the impeller has likely spit due to corrosion on the motor shaft. This makes it near impossible to un screw the impeller. You can try and isolate the armature of the motor and use a channel lock on the impeller. The only other way to get it off is by breaking it. Use a flat head screwdriver and a hammer and break apart the area around the center of the impeller until you can pry off the everything but the stem. You'll have to remove the ceramic part of the seal and pick out as much of the stem as you can. Then you can get the wetend off the motor and remove the metal cup seal.

The impeller is screwed on to the motor shaft; to remove it you need to hold the motor shaft at the fan end so that you can unscrew the impeller - normal right hand thread. Holding the shaft can sometimes be quite difficult so a good suggestion would be to remove the fan cowl along with the fan, this will enable you to secure the shaft with a small pipe wrench or similar. Once you have the impeller removed it will be possible to ascertain what steps need to be taken next - you may need a new shaft sleeve as well as a new mechanical seal assembly.
Good luck,
Mike G

Might be a screw in middle of impeller with reverse thread. If so, remove. Remove back cover of motor, hold center shaft with wrench and unscrew impeller from shaft.

if the shaft is moveing from side to side you need to replace the motor. did you tern the impeller around about 3 complet terns?

go back to drain pump.. pull pump out ckd the impeller on motor pump shaft there should be a slight resistance when the impeller is turned by hand ..have seen impeller come loose of motor shaft and free wheel